Re: Difference in luma-chroma delay of C64/C128 compared to standard S-video

From: HÁRSFALVI Levente <>
Date: Sat, 2 Sep 2017 13:11:22 +0200
Message-ID: <>
On 2017-09-02 12:51, wrote:
>> On 2017-09-02, at 10:21, wrote:
>> Am Samstag, 2. September 2017, 03:54:33 CEST schrieben Sie:
>>> But france also used the opposite polarity of the video signal compared
>>> to most other countries, and they also used AM modulated audio on RF.
>>> So the RF modulator must have been different.
>> wasnt it the other way around? ie SECAM used FM, the rest AM?
> He's talking about France. SECAM uses FM modlulation for the chroma subcarriers (which was BTW giving us a lot of PITA back in the days), while the others use AM next to phase. What France used for broadcasting TV audio is beyond me but outside of France audio was F3E (aka FM) transmitted, either 6.5 or 5.5 MHz to the side of the video.

This is it. Terrestrial broadcasting has been system B/G/D/K/I for most
of Europe (old systems aside), which is negative modulation for video
and FM for audio. But not France (and probably Luxemburg), that used
system L, ie. positive modulation for video and AM sound. Bottom line,
that also naturally means that TV sets produced in the Eastern bloc back
in the days, wouldn't have been compatible with French broadcasting and
vice versa, even though they're both popularly known as "SECAM" devices.


       Message was sent through the cbm-hackers mailing list
Received on 2017-09-02 12:02:24

Archive generated by hypermail 2.2.0.